[Solved] What is this neon pink texture map?

msam921

I'm sure I have seen these before, but I must be having a "senior moment" or something. I bought a model off of CGTrader from a vendor I've done business with before -- his low poly retro-style models are da bomb -- and, while applying the model's textures in Daz Studio, I drew a blank as to what kind of map this one in particular is. I know after someone tells me I'm going to slap myself in the head - "duh!!"

Edit: Nevermind. I just realized the vendor's item description explains what each texture map is. *slaps head*